the seoul city government is to toss twenty first time ever. stress level went for over eighty five micrograms per cubic meter for two consecutive hours at four pm on thursday a level of ninety three micrograms of dust was detected for every cubic meter. when even as high as sixty six michael grant without a smoke and toxic dusthat covered most of the nation since early this week with average concentration levels that are two to three times higher than normal. on wednesday particular dust levels in seoul based nearly two hundred micrograms a cubic meter. do it four times now serve on a normal day. that's well beyond a precaution level of under twenty michael transferred to the meter set by the national institute of environmental research. it's also more than seven times the level recommended by the world health organization which has a standard of twenty five michael grands prix cubic meter. in the southern district of coal dust levels reached nearly three hundred micrograms per cubic meter on wednesday forcing the city to show preliminary thos